129787943 has 2 divisors, whose sum is σ = 129787944. Its totient is φ = 129787942.

The previous prime is 129787939. The next prime is 129787949. The reversal of 129787943 is 349787921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129787943 - 2² = 129787939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129787891 and 129787900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129787949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64893971 + 64893972.

It is an arithmetic number, because the mean of its divisors is an integer number (64893972).

Almost surely, 2^129787943 is an apocalyptic number.

129787943 is a deficient number, since it is larger than the sum of its proper divisors (1).

129787943 is an equidigital number, since it uses as much as digits as its factorization.

129787943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 129787943 is about 11392.4511409968. The cubic root of 129787943 is about 506.3041064357.

The spelling of 129787943 in words is "one hundred twenty-nine million, seven hundred eighty-seven thousand, nine hundred forty-three".